| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | R | 14,312 | 29,288 | 44,584 | |
| 2020 | R | 12,895 | 28,996 | 42,911 | |
| 2016 | R | 8,903 | 25,067 | 36,460 | |
| 2012 | R | 9,319 | 22,796 | 32,843 | |
| 2008 | R | 11,874 | 22,008 | 34,253 | |
| 2004 | R | 6,912 | 20,771 | 27,867 | |
| 2000 | R | 6,503 | 15,943 | 22,950 | |
| 1996 | R | 6,123 | 12,907 | 21,428 | |
| 1992 | R | 4,752 | 11,072 | 20,639 | |
| 1988 | R | 5,355 | 13,374 | 18,780 | |
| 1984 | R | 4,550 | 12,880 | 17,504 | |
| 1980 | R | 5,124 | 12,093 | 18,138 | |
| 1976 | R | 6,191 | 10,072 | 16,427 | |
| 1972 | R | 3,069 | 11,019 | 14,150 | |
| 1968 | R | 3,902 | 7,516 | 13,366 | |
| 1964 | D | 6,573 | 6,370 | 12,993 | |
| 1960 | R | 4,930 | 7,543 | 12,528 | |
| 1956 | R | 4,600 | 6,962 | 11,617 | |
| 1952 | R | 4,539 | 6,964 | 11,619 | |
| 1948 | D | 4,948 | 4,721 | 9,826 | |
| 1944 | R | 4,652 | 5,139 | 9,938 | |
| 1940 | D | 5,417 | 5,283 | 10,785 | |
| 1936 | D | 5,962 | 4,174 | 10,180 | |
| 1932 | D | 5,836 | 4,055 | 10,081 | |
| 1928 | R | 3,626 | 4,788 | 8,476 | |
| 1924 | D | 4,364 | 4,063 | 8,595 | |
| 1920 | D | 4,958 | 4,422 | 9,579 | |
| 1916 | D | 2,779 | 2,138 | 5,144 | |
| 1912 | D | 2,594 | 738 | 4,998 | |
| 1908 | D | 3,040 | 2,472 | 5,683 | |
| 1904 | D | 2,806 | 2,633 | 5,676 | |
| 1900 | D | 2,930 | 2,295 | 5,334 | |
| 1896 | D | 2,886 | 2,236 | 5,173 | |
| 1892 | D | 2,329 | 1,932 | 4,530 | |
| 1888 | — | — | — | — | |
| 1884 | — | — | — | — | |
| 1880 | — | — | — | — | |
| 1876 | — | — | — | — |
Hancock County's population has climbed steadily as suburban sprawl pushes east from Marion County, yet its presidential margins have remained among Indiana's widest, with the 2024 gap exceeding 33 points.
The Republican margin in Hancock County reached its widest at fifty-six points in 1972. The margin in 2024 was thirty-four points, in line with the county's deep historical pattern.
Hancock County's loyalty is rooted in its place. Median household income of $93,186, a 89% non-Hispanic-white share, and a population of 84,037 together describe a community whose political habits are deeply settled. The county's voting pattern over the last decade is most similar to that of Johnson County and Rockingham County.
